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#!/usr/bin/env python3
# Copyright 2021 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
r"""
Generates json trace files viewable using chrome://tracing using RPCs from a
connected HdlcRpcClient.
Example usage:
python pw_trace_tokenized/py/pw_trace_tokenized/get_trace.py -s localhost:33000
-o trace.json
-t out/host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_rpc
pw_trace_tokenized/pw_trace_protos/trace_rpc.proto
"""
import argparse
import logging
import glob
from pathlib import Path
import sys
from typing import Collection, Iterable, Iterator
import serial # type: ignore
from pw_tokenizer import database
from pw_trace import trace
from pw_hdlc.rpc import HdlcRpcClient, default_channels
from pw_hdlc.rpc_console import SocketClientImpl
from pw_trace_tokenized import trace_tokenized
_LOG = logging.getLogger('pw_trace_tokenizer')
PW_RPC_MAX_PACKET_SIZE = 256
SOCKET_SERVER = 'localhost'
SOCKET_PORT = 33000
MKFIFO_MODE = 0o666
def _expand_globs(globs: Iterable[str]) -> Iterator[Path]:
for pattern in globs:
for file in glob.glob(pattern, recursive=True):
yield Path(file)
def get_hdlc_rpc_client(device: str, baudrate: int,
proto_globs: Collection[str], socket_addr: str,
**kwargs):
"""Get the HdlcRpcClient based on arguments."""
del kwargs # ignore
if not proto_globs:
proto_globs = ['**/*.proto']
protos = list(_expand_globs(proto_globs))
if not protos:
_LOG.critical('No .proto files were found with %s',
', '.join(proto_globs))
_LOG.critical('At least one .proto file is required')
return 1
_LOG.debug('Found %d .proto files found with %s', len(protos),
', '.join(proto_globs))
# TODO(rgoliver): When pw has a generalized transport for RPC this should
# use it so it isn't specific to HDLC
if socket_addr is None:
serial_device = serial.Serial(device, baudrate, timeout=1)
read = lambda: serial_device.read(8192)
write = serial_device.write
else:
try:
socket_device = SocketClientImpl(socket_addr)
read = socket_device.read
write = socket_device.write
except ValueError:
_LOG.exception('Failed to initialize socket at %s', socket_addr)
return 1
return HdlcRpcClient(read, protos, default_channels(write))
def get_trace_data_from_device(client):
"""Get the trace data using RPC from a Client"""
data = b''
service = client.client.channel(1).rpcs.pw.trace.TraceService
result = service.GetTraceData().responses
for streamed_data in result:
data = data + bytes([len(streamed_data.data)])
data = data + streamed_data.data
_LOG.debug(''.join(format(x, '02x') for x in streamed_data.data))
return data
def _parse_args():
"""Parse and return command line arguments."""
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument('-d', '--device', help='the serial port to use')
parser.add_argument('-b',
'--baudrate',
type=int,
default=115200,
help='the baud rate to use')
group.add_argument('-s',
'--socket-addr',
type=str,
help='use socket to connect to server, type default for\
localhost:33000, or manually input the server address:port')
parser.add_argument('-o',
'--trace_output',
dest='trace_output_file',
help=('The json file to which to write the output.'))
parser.add_argument(
'-t',
'--trace_token_database',
help='Databases (ELF, binary, or CSV) to use to lookup trace tokens.')
parser.add_argument('proto_globs',
nargs='+',
help='glob pattern for .proto files')
parser.add_argument(
'-f',
'--ticks_per_second',
type=int,
dest='ticks_per_second',
default=1000,
help=('The clock rate of the trace events (Default 1000).'))
return parser.parse_args()
def _main(args):
token_database = \
database.load_token_database(args.trace_token_database, domain="trace")
_LOG.info(database.database_summary(token_database))
client = get_hdlc_rpc_client(**vars(args))
data = get_trace_data_from_device(client)
events = trace_tokenized.get_trace_events([token_database], data,
args.ticks_per_second)
json_lines = trace.generate_trace_json(events)
trace_tokenized.save_trace_file(json_lines, args.trace_output_file)
if __name__ == '__main__':
if sys.version_info[0] < 3:
sys.exit('ERROR: The detokenizer command line tools require Python 3.')
_main(_parse_args())
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